Operation In Vector Control - Omron SYSDRIVE 3G3MV User Manual

Basic Operation

5-2 Operation in Vector Control

The Inverter in vector control mode calculates the vector of the operating
condition of the motor. Then the 150% rated output torque of the motor is
provided at an output frequency of 1 Hz. Vector control provides more pow-
erful motor control than V/f control and makes it possible to suppress
speed fluctuation with changes in loads.
To operate the Inverter in vector control mode, be sure to set the following
parameters.
n036 (rated motor current), n106 (rated motor slip), n107 (motor wire-to-
wire resistance), n110 (motor no-load current)
H Setting the Rated Motor Current (n036)
·Check the motor nameplate and set this parameter to the rated current.
·This parameter is used as a vector control constant. Be sure to set the parameter cor-
rectly. This set value is also used for determining the electronic thermal characteristics
to protect the motor from overheating. The correct set value protects the motor from
burning that may result from overloading.
n036 Rated Motor Current
Setting 0.0% to 150% (A) of rated
range output current of the Inverter
Note The default setting for this parameter is the standard rated current of the maxi-
mum applicable motor.
H Setting the Rated Motor Slip (n106)
·Set the rated motor slip in n106.
·This parameter is used as a vector control constant. Be sure to set the parameter cor-
rectly. This set value is used for slip compensation as well.
·Calculate the rated motor slip value from the rated frequency (Hz) and rpm on the
motor nameplate by using the following formula.
Rated slit value (Hz) = Rated frequency (Hz) -- Rated rpm x Number of poles/120
Rated Motor Slip
n106
Setting 0.0 to 20.0 (Hz)
range
Note The default setting for this parameter is the standard motor slip of the maximum
applicable motor.
Register 0124 Changes during
Hex operation
Unit of 0.1 A Default setting
setting
Register 016A Changes during
Hex operation
Unit of 0.1 Default setting
setting Hz
Chapter 5
No
See note
Yes
See note
5-5